Falls



NITED- STATES PAT NT Fries.

ERSKINE L. BABCOOK AND EDWARD D. SOHMITT, OF CUYAHOGA FALLS, OHIO, ASSIGNOR TO THE FALLS RIVE'I AND MACHINE COMPANY, OF

SA ME PLACE.

FRICTION-CLUTCH MECHANISM.

SFECIFIOATION forming part of Letters Patent No. 511,320, dated December 26, 1893.

Application filed April 8, 1893. Serial No. 469,535- (No model.)

To all whom it may concern.-

Be it known that we, ERsKINE L. BABCOOK and EDWARD D. SOHMITT, of Ouyahoga Falls, in the State of Ohio, have invented a new and useful Improvement in Friction-Clutch Mechanism, of which the following is a specifica- In the drawings, Figure 1 is an end View of aportion of a pulley and of the friction clutch 1o mechanism. Fig. 2 is a longitudinal section each of these arms opposite the ring e, projects backward an ear 9 g parallel with one another. Between these arms extend the pivots h and 2. Upon the pivot h between the ears g and g, are hinged the jaws j and j extending forward on either side of the frictron-ring e and provided with the wooden friction-blocks 7c in. Between these jaws is interposed a coil-spring Z which tends to hold them apart. Fixed to the jaws are the inversely extending lugs m m each provided at its extremity with an opening suitable for p votal connection on opposite sides of the PIVOlJt. Now, it will be seen, that when the aws j and j are drawn together, a friction con- 5 nection will be made between the blocks in k and the ring e,- but when the jaws are not drawn together, they will be held apart so as to break the friction connection by the spring Z. '1 he prime mover by which this operation 40 is efiected, is a sleeve 01. of ordinaryconstruction on the shaft 1) and we have illustrated in Flgs- 2, 3 and 4 respectively, three modifications of mechanism whereby the movement of this prime mover is transmitted to the jaws.

In Fig. 2, upon the pivot t is mounted a rocker 0 pivotally connected with the ears m and m by the pivots o and 0 respectively. ough the long arm of this rocker, passesa set screw 1) provided with the nuts 19 and 10 by which it may be adjusted in difierent positions in the rocker o. q is an angle-lever fulcrunied between the ears r r fixed to the arms f f respectively. One arm of the lever q is coupled to the end of the set screw pby the link q, and the other arm of the lever q is coupled to the sleeve to by the link g Now, it is evident that when the parts arein the position shown in Fig. 2 the friction clutch is released, but by forcing the sleeve 01 toward the collar d, the short arm of the lever q and the link q act together as a toggle joint to force the rocker in the direction of the arrow and draw the two jaws together in antagonism to the spring Z. It will also be observed that owing to the disposition of the parts of the clutch mechanism, as it is swung round by the shaft in its unclutched position, there will be no substantial tendency for centrifugal force to cause the jaws to advance toward each other.

In Fig. 3 the angle lever (1 instead of being coupled to a set screw on the rocker bears against the inclined side of a slide p adjustably mounted in the rocker 0 and held to any suitable adjustment by the nuts 19 19 In the modification shown in Fig. 4, the short arm of the lever q is cam shaped and bears against the extremity of the setscrew 19 which may be adjusted in the rocker 0. The cam formation on the lever q here performs the function of the incline on the slide 19 of Fig. 3 and the adjustment of the set screw 19 performs the function of the adjustment of the slide 11 In all modifications shown, when the jaws are released they are held substantially equidistant from the friction-ring because the position of the rockero is fixed by .the pivot '6 and the position of the jaws with respect to the rocker are substantially fixed by the pivots 0' 0 which fit snugly, in the direction of the radius from the shaft but are allowed sufficient play in a direction parallel with the shaft b to provide for the rotary motion of the rocker 0.

We are aware of the patent to J. W. Dawson, No. 299,205, dated May 27, 1884, in which a pair of jaws operating as levers of the first order are pivoted to a clutch and fixed t0 the shaft, and engage at one end a friction-ring ICO llxed to a spool or pulley and at the other end are forced apartbya wedge-block mounted between them upon a sleeve, and we make no claim for such contrivance.

\Ve claim- 1. In combination, a shaft, a pulley, a friction ring fixed thereto, a clutch arm fixed to the shaft, a pair of jaws pivoted at one end upon the clutch arm and engaging at the other end with the friction ring, a spring whereby said jaws are held apart, a rocker pivotally connected with said clutch arm and with said jaws intermediate their ends, a sleeve on the shaft and means whereby the motions of said sleeve are communicated to said rocker, substantially as described.

2. In combination a shaft, a pulley, a fric tion ring fixed to the pulley, a clutch arm fixed to the shaft, the jaws engaging at one end with the friction ring and pivoted at the other end to the clutch arm, the spring whereby said jaws are held apart, the rocker pivotally connected with the clutch arm and with the jaws whereby the jaws are held equidistant from the friction ring, a sleeve upon the shaft and means whereby the motions of said sleeve are communicated to said rocker, substantially as described.

In combination the shaft, the pulley, the friction ring fixed to the pulley, the clutch arm fixed to the shaft, the jaws pivoted at one end to the clutch arm and engaging at the opposite end with the friction ring, the spring whereby the jaws are held apart, the rocker pivotally connected to the clutch arm and to the jaws, a lever q, a link (1 a sleeve upon the shaft and adjusting mechanism whereby the position of the jaws may be adjusted relati vcl y to the sleeve, substantially as described.

l. In combination a shaft, a pulley, a friction ring fixed upon the pulley, a clutch arm fixed to the shaft, jaws pivoted at one end to the clutch arm and engaging at the other end with the friction ring, a spring whereby said jaws are thrust apart, a rocker pivotally connected to said clutch arm and said jaws and containing a long arm extending radially inward toward the shaft, whereby the position of the jaws may be adjusted relatively to the sleeve, a sleeve upon the shaft, adjusting mechanism at the extremity of said long arm, whereby the position of the jaws may be adjusted relatively to the sleeve and means whereby the motions of said sleeve are transmitted to said adjusting mechanism, substantially as described.

5. In combination a shaft, a pulley, a friction ring fixed to the pulley, a clutch arm fixed to the shaft, jaws pivotally connected at one end with the said clutch arm and engaging at the opposite end with said friction ring, a spring whereby said jaws are thrust apart, a rocker pivotally connected with said clutch arm and said jaws, a sleeve upon the shaft, a lever pivoted to the clutch arm, a link interanother link interposed between said lever and said rocker, substantially as described.

ERSKINE L. BABCOCK. EDVARD D. SOIIMIT'T.

Witnesses:

Tnos. F. WALsI-I, J. A. Lone.

posed between said lever and said sleeve and 

